As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DID ROUTINE OIL CHANGE AT 100-HOUR/ANNUAL INSPECTION. ALL NORMAL UNTIL RUN-UP AT COMPLIANCE OF INSPECTION. LOW OIL PRESSURE AT ALL POWER SETTINGS. SPSI AT IDLE. TROUBLESHOT SITUATION AND FOUND BAD OIL FROM 2 EACH 1-GALLON JUGS (WERE SEALED) FROM OIL INVENTORY. DRAINED OIL. REMOVED FILTER AND INSTALLED NEW OIL. OPS CHECKED NORMAL. SUBMITTER SUGGESTED GOOD RUN-UP/WARM-UP AND DOUBLE CHECK OIL PRESSURE.